Pete Hansen was from the SBL and became a finals MVP. I'd hope that the Wildcats look at state leagues for imports. It'd be crazy to rule out someone just because of where they play
It should tell you something that you needed to go back a quarter of a century to find an example...
The NBL was still really in its infancy, and whilst we had some fantastic imports in that era, reality is that the NBL then would not have been as attractive to high quality of players we can attract today.
The point is that if you pick up quality young players like Ennis, Prather, MacRae, etc, etc, you know there's a good chance that a season in the NBL will simply be a stepping stone to either another crack at the NBA or Europe. That's the risk you take in chasing quality.
If you want to be safe, and know that your import will be begging for a new contract, you aim for someone at a lower tier.
Someone like Beal is probably somewhere in the middle of those two. NBA is off the table, and he probably won't get a substantially better offer elsewhere. He's an excellent player, but there are undoubtedly better available. (Finding them and convincing the to come to Australia might be the hard part.)
For the record though, I love Dolla, and hope he stays, settles down, and gets naturalised.
But if so, we need to make sure that SF is a gun, and can shoot 3's.